Wire-clamp for wire-stretching machines.



D. C. BROGDBN;

WIRE CLAMP FOR WIRE STRETGHING MACHINES.

-APPLIGATION FILED NOV. 9, 1909.

Patented Apr. 30, 1912.

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UNITED STATES mirnwr ()FFIGE.

DAVID BROGDEN, OF PARAGOULD, ARKANSAS.

WIRE-CLAMP FOR WIRE-STRETCHING IVIACHINES.

Specification of Letters Patent.

Patented Apr. 30. 191.2.

Application filed November 9, 1909. Serial No. 527,036.

To all whom it may concern:

Be it known that 1, DAVID C. Bnosonu, a

citizen of the United States, residing at lates to aclamp to be used in conjunction with the fence-stretching. mechanism shown in my pending application, Serial No. 500,541, filed June 7, 1909.

The invention has for its object the provision of a clamp particularly adapted for use as above stated and arranged to grip a wire or a plurality of strands of wire.

For a full understanding of the invention and the merits thereof, and to acquire a knowledge of the details of construction, reference is to be had to the following de scription and accompanying drawing, in which:

Figure 1 is a perspective view of my wire clamp applied; Fig. 2 is a fragmentary 1on1,

gitudinal section thereof; Fig. 3 is a fragmentary detail perspective of the middle clamping lever and clips detached or disassembled.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing by the same reference characters.

Referring to these figures, 2 designates opposed clamping bars which are'preferably of wood, as I have found in practice that this gives the best-frictional engagement with the wires, wood being soft enough to allow the wires tobe somewhat impressed into its surface as the clamp is tightened. The two clamping bars are held together, preferably at their two ends 'and at the middle, by "clamps mounted on clips which inclose the two bars. These clips consist, preferably, of the two opposed links 3 and the transverse bar 4, the ends of the links 3 being reduced, screw threaded and passed through holes in the ends of the cross bars 4. Nuts 5 are attached t6 the screw-threaded ends. The other ends of the links: are provided with the transverse bolt 6 upon which is rotatably mounted a clamping eccentric or cam 7 having a handle 8. The face of this eccentric is as wide as the width of the clamping bars 2 and is formed with the op posed beveled face 7. It will be seen that when the eccentric is turned in one position, the clamping bars may be opened out, and that when turned in the other position, that is, with the handle parallel to the clamping bars, the bars will be drawn toward each other. By adjusting the nuts 5, the distance between the face of the eccentric and the cross bar at may be increased so that the clamping bars 2 may accommodate larger wires between them. The oppositely beveled face of the eccentric head provides a narrow edge for the head whichbites' into the wood of the clamping bars, when the eccentric head is t-urned'into operative posi-' tion, thus holdingthe eccentric head from accidental slipping. In addition thereto each flat beveled face 7 will act to prevent the accidental binding of the clamp head when turned to a partly open position. If the face of the eccentric head was rounded it would be liable to exerta wedging action. Unless turned comp etely over 1t will prevent the free outward movement of the. clamping bar. The beveled face, however,

permits considerable movement of the clamping bar but does not allow the eccentrio head to wedge in place unless positively operated to that end.

For the middle clamp, I prefer to use a slightly different construction comprising the opposed links 3 carrying the cross bar 4' at one end, and having the nuts 5, as before described. These links 3, however, at their. other ends are slotted, as at 9, toen 'age with projecting studs 10 .on the ends of 'the eccentric head K. It will be seen that the operation of this clamp, as far as drawing the two clampingabars 2 toward ea 11 other I is concerned, is exactly similar toth action of the clamping: sockets previoufly described, but that the device has the. advantage, that'the eccentric head may e easily detached from the side bars or clips 3 to permit the ready detachment or attabhment of the clip thereof to the clamping bars. This is particularly iin ortant for' the clip located at the middle 0? the clamping bars.

The end clips and clamps can be'readlly detached by merely shifting them off the ends of the clamping bars, but this might be considerable trouble with the middle clampin bar. It will be understood of course, that may make all three of the clips in the form shown in Fig. 1, if desired. 1

The operation of my inventio' is as follows: The Wire net or the se :il strands of Wire which are to be strct l are placed between. the clamping b: i clips are then placed upon the bars, and is clamps closed down, forcing the bars t her and rigidly engaging the bars with c Wire. After the bars have been tightly engaged With the Wire, the clamping bars re connected, as by the book A to any snitziliie tightening mechanism, such as shown in my pending application before referred to, which will draw the bars and stretch the Wire tightly.

lVhile I designed my invention particularly for use in tightening; Wire fences 1 do not Wish to be limited to this, as it, obvious that the tightening bars might be an plied wherever it was de ired to secure a lirin grip upon :1 wire 0i series ct Wires,

My invent-ion simple, easily applied or ren'iovcd, and l have found it tl'ioroughly e1 fective in practice, by its use all the wires of the fence, or all the strands of Wire nctting, evenly pulled and Without danger of tearing out the meshes of the Wire net- WOIlL Havinfl" E3 thus described the invcntionnvhal'; I claim 1s 2* A Wire stretcl'ier comprising paralleh opnose-n25 positely disposed bars of relatively soft ma terial, said bars being freely movable with relation to each other and adapted to clamp a section of Wire fence between them, clamping devices freely movable longitudinally upon the bars and including oppositely disposed side clips, each clip being screw threaded at one end and having an angular notch at the other a transverse her having perforations through which the screw threaded ends of the clip pass, a not on the screw threaded end of each clip for adjust-- ing it relative to the transverse bar, and a, cam block disposed between each pair of clips and having oppositely disposed trnn' nions at its ends detachably engaging in said notches in he side clips, said cam block having at one side flat; faces which converge tourd each other at equal. angles, said bloch also having at its side and disposed approxi matel v at right angles a laterelly eiitending handle.

In testinion whereof I atlix my signature in presence of two witnesses.

DAVID C. BROGDEN.

Witnesses 

